/Engine/Source/Editor/ContentBrowserData/Public/ContentBrowserDataSource.h
Set the data sink that can be used to communicate with the Content Browser Data Subsystem. This is set to a valid instance when the data source is activated, and set to null when it is deactivated.
void SetDataSink ( [IContentBrowserItemDataSink](API\Editor\ContentBrowserData\IContentBrowserItemDataSink) * InDataSink )